The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 2018
Filed:
Jan. 24, 2014
Applicant:
Nvidia Corporation, Santa Clara, CA (US);
Inventors:
Daehyun Chung, Santa Clara, CA (US);
Sunil Sudhakaran, Santa Clara, CA (US);
Assignee:
Nvidia Corporation, Santa Clara, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 7/22 (2006.01); G11C 11/4076 (2006.01); G11C 7/10 (2006.01);
U.S. Cl.
CPC ...
G11C 7/22 (2013.01); G11C 7/109 (2013.01); G11C 7/1087 (2013.01); G11C 7/1093 (2013.01); G11C 11/4076 (2013.01);
Abstract
A memory driver, a method of driving a command bus for a synchronous dual data rate (sDDR) memory and a memory controller for controlling dynamic random-access memory (DRAM). In one embodiment, the memory driver includes: (1) pull-up and pull-down transistors couplable to a command bus of a memory controller and operable in 1N and 2N timing modes and (2) gear down offset circuitry coupled to the pull-up transistor and operable to offset the command bus when transitioning out of the 1N timing mode and increase an extent and duration of 1-0-1 transitions on the command bus.